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slartg.f(3)				      LAPACK				      slartg.f(3)

       slartg.f -

       subroutine slartg (F, G, CS, SN, R)
	   SLARTG generates a plane rotation with real cosine and real sine.

Function/Subroutine Documentation
   subroutine slartg (realF, realG, realCS, realSN, realR)
       SLARTG generates a plane rotation with real cosine and real sine.


	    SLARTG generate a plane rotation so that

	       [  CS  SN  ]  .	[ F ]  =  [ R ]   where CS**2 + SN**2 = 1.
	       [ -SN  CS  ]	[ G ]	  [ 0 ]

	    This is a slower, more accurate version of the BLAS1 routine SROTG,
	    with the following other differences:
	       F and G are unchanged on return.
	       If G=0, then CS=1 and SN=0.
	       If F=0 and (G .ne. 0), then CS=0 and SN=1 without doing any
		  floating point operations (saves work in SBDSQR when
		  there are zeros on the diagonal).

	    If F exceeds G in magnitude, CS will be positive.


		     F is REAL
		     The first component of vector to be rotated.


		     G is REAL
		     The second component of vector to be rotated.


		     CS is REAL
		     The cosine of the rotation.


		     SN is REAL
		     The sine of the rotation.


		     R is REAL
		     The nonzero component of the rotated vector.

	     This version has a few statements commented out for thread safety
	     (machine parameters are computed on each entry). 10 feb 03, SJH.

	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

	   September 2012

       Definition at line 98 of file slartg.f.

       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2				 Tue Sep 25 2012			      slartg.f(3)
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